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Discuss Strange DNS and Wifi issues at the General - Hackint0sh.org; Hello, My wifi doesn't seem to be able to connect to the internet despite able ...
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    Question Strange DNS and Wifi issues

    Hello,

    My wifi doesn't seem to be able to connect to the internet despite able to talk to the local network.

    I can ssh into my iphone from any machine.

    When do ifconfig, it looks fine.

    When I do
    ping google.com, it doesn't respond. However, when I do
    ping 64.233.167.99, there are responses.

    So, it means internet is working, but somehow the network doesn't seem to know where to find the dns server despite it's been given one.

    I have no problem doing this at home, but funny it doesn't quite work at the office.

    Can anyone help ?



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    Quote Originally Posted by beergut View Post
    Hello,

    My wifi doesn't seem to be able to connect to the internet despite able to talk to the local network.

    I can ssh into my iphone from any machine.

    When do ifconfig, it looks fine.

    When I do
    ping google.com, it doesn't respond. However, when I do
    ping 64.233.167.99, there are responses.

    So, it means internet is working, but somehow the network doesn't seem to know where to find the dns server despite it's been given one.

    I have no problem doing this at home, but funny it doesn't quite work at the office.

    Can anyone help ?
    Go to the phones wifi connection menu, and click the blue arrow - what it list the correct dns server IP? usually the router / gateway

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    It lists 212.74.112.66, 212.74.112.67

    which is also in the file /etc/resolv.conf

    And NOT the router/gateway IP. Is that a problem ? It used to work.

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    Quote Originally Posted by beergut View Post
    It lists 212.74.112.66, 212.74.112.67

    which is also in the file /etc/resolv.conf

    And NOT the router/gateway IP. Is that a problem ? It used to work.
    It happens quite often. The known fix to that is to use OpenDNS (http://www.opendns.com/) nameservers
    208.67.222.222
    and/or
    208.67.220.220
    on the iphone. Otherwise the iphone tries to use the cached nameserver of your router and sometimes fails then. i have set one in the iphone and both in my router aswell. even when travelling (hotspot), the opendns nameservers are really fast, free and really reliable.
    helped on my iphone

    volkspost
    Read the stickies and search the forum before posting!
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    volkspost

    Tried it, and it works. Wonder why that was the case, is there a way to reset the DNS cache ?


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    Quote Originally Posted by beergut View Post
    volkspost

    Tried it, and it works. Wonder why that was the case, is there a way to reset the DNS cache ?
    The two server ips you had are from ns.uk.tiscali.com. usually if you use a router your provider is "gving" you the ip-adress, dns etc. the router then uses it. sometimes the provider-dnsses are really slow plus you dont have to use them...
    have you ever used the iphone in dhcp mode in your wlan? if so it also sucks the dns from your router->provider.
    thats exactly what often does not work out. pull the plug and aswell use the two opendns servers in your router configuration, if the router allows that. my draytek always had this fields...
    after using the new settings the cache will be cleared at the regular automatic "housekeeping" session of mac os x

    volkspost
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